Which Statement Regarding Our Dependence on a Small Number of Domesticated

Which statement regarding our dependence on a small number of domesticated plant species for food is true?

A) Certain deleterious alleles could accumulate in these crops, making our reliance on a small number of species risky.
B) The land used to grow a particular crop could become depleted of certain nutrients, making further propagation impossible.
C) The species we currently depend on contain a great amount of genetic diversity.
D) The species we currently depend on contain the best balance of nutrients humans need to survive.
E) Growing relatively few varieties of certain crops reduces genetic variation within plant populations and puts us at greater risk of sweeping crop losses due to diseases and pests.